asked on

Java crashes IE on a Terminal Server

I have users logging onto a Terminal server (2k3, SP2 64bit)

Users need to access a training site that uses Java. Whenever a Java applet opens it crashes out IE, and writes a log to the desktop. This doesn't happen for a domain admin account though.

I have moved the server to an OU in AD that has no GPOs applied, and the same occurs. I have tried different versions of Java, and the same occurs. I have noticed that the same crash occurs when I open the "Sun Java console" from the IE Tools menu.

I am using JRE 1.6.0, and IE 7.

Any ideas welcome!

Venabili

64bit 2k3? Ouch - that's a known problem for not-priveleged users
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6532730

tryto upgrade to the current version of Java 6 -- we are on update 19 now.

smudge67er

ASKER

I know, I know. I'm a contractor, I wouldn't have built the servers that way either. I'll try a newer version of Java, but the courseware people said it should be run on 1.6.0

smudge67er

ASKER

1.6.15 doesn't bomb out IE, and it gets through to the course page, but now when "beginning the course" it goes no further. Java console shows "Uncaught error catching image"

Venabili

But his is 1.6.0 u19 :) If they want the clean 1.6.0, you have a proof that there is a bug in the VM.

The new problem -- It does not happen when you use an Admin account?

smudge67er

ASKER

I've tried 1.6.0 u19 before. With u19, and u15 you get the "Uncaught error catching image" message, even as an admin

Venabili

If you get it always, it is either a bug in the applet or another VM bug.
Or something else in the middle

Do you have the full error message? Can you check the Java console for the full stacktrace? Or the log file.

smudge67er

ASKER

Full log on 1.6.0.?

Venabili

No, no.

Of the non-working u15 or u19 - the "Uncaught error catching image" one.

The clean 1.6 is clear - it is a VM bug, you cannot do anything.

smudge67er

ASKER

The strangest thing as happened. I installed 1.6.0 u 19 as well as the 1.6.0. Removed both versions and installed 1.6.0 again, and it has worked. I have logged off and back on again, and it's worked. Trying it with another user to test.

smudge67er

ASKER

Ignore that, it's stopped working again. Will post the log of u19

smudge67er

ASKER

Venabili

Here is your problem - the security of the applet. - unfortunatelly without the code, there is almost no way to troubleshoot - the browser is blocking something at the moment...

Venabili

let's try to check a few things:
- Is the applet signed?
- Does it work on the same OS with the non-privileged user but without the Terminal Server?
- Are you sure the thing can work for non Admin users?

smudge67er

ASKER

Venabili

And what is the error in this case?

smudge67er

ASKER

It doesn't load the page. It sits there saying "please wait" but no course loads"

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Venabili

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Venabili

(For the signed applets - it should show you a certificate prompt to accept the certificate and run the applet if it is signed... )

smudge67er

ASKER

There is no prompt to accept a certificate.

I have seen this working on Terminal servers, as an admin, with 1.6.0, but it crashe IE as a normal user account.

It works ok on an XP laptop on 1.6.0 as either a user, or admin.

Any other version of Java on either TS, or XP laptop, as a user or Admin just hangs when trying to open the course and sits at the "Please wait" part before the course starts

Hope that makes it clearer?

Venabili

So it works with clean 1.6 on XP but does not work with u19.
At the same time, it cannot work with the clean 1.6 on Terminal Services and 64bit 2k3 because of the VM bug.

Now that's bad news - no idea what the developers did but anything working on the clean 1.6 should be working on u19...

The best thing I can say at this point is to get access to someone that can actually debug the code.

Venabili

I am wondering...

u19 did some security updates so some of what you see on the XP might be a side effect of it (and basically) to end up a problem for the code). Did you say that you have u15 as well? Can you try with it?

smudge67er

ASKER

Our machines are heavily locked down to to being of a MoD secure standard, CESG approved etc, so some part of the lockdown could be causing an issue in the later versions of Java?

I have tried u15 and the same "hanging" occurs"

saulat78

this is because your logged user does not have enough privileges to access this resource, you need to create a signed applet
http://www.einfobuzz.com/2010/04/how-to-create-a-signed-applet.html

Venabili

saulat78,

If he needed it signed, he would not work anywhere. I am not sure that signing will solve this.

smudge67er,

Then back to my old advice - talk to the developers. Something strange is happening here and short of looking through the code, I am out of ideas :(

n_sachin1

network: Cache entry not found [url: http://edmsweb/crossdomain.xml, version: null]
network: Connecting http://edmsweb/crossdomain.xml with proxy=DIRECT
network: Connecting http://edmsweb:80/ with proxy=DIRECT

Your domain as it looks like from the logs is http://library.skillport.com and your applet is attempting the load a resource from http://edmsweb:80

Thats not allowed unless you sign the applet.
If you want to know whether the applet is signed or not, the simplest way would be to locate the applet jar file and look at the MANIFEST.MF. If its signed, this file will include the signatures.

Kevin Cross

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